Machine for lapping wire drawing dies



May 4, 1948. P. BIEBERICH' I MACHINE FOR LAPPING WIRE DRAWING DIES Filed Oct. 29, 1945 :5 Sheets-Sheet 1 M MENTOR.

ATTORNEY P. BIEBERICH MACHINE FOR LAPPING WI RE DRAWING DIES May 4, 1948.

Filed Oct. 29, 1945 3 Sheets-Sheet 2 A'T TOPN E Y y 4, 1948. P. BIEBERICH 2,441,004

MACHINE FOR LAPPING WIRE DRAWING DIES Filed Oct. 29, 1945 s Sheets-Sheet s ATTORNEY.

Patented May 4, 1948 UNITED "STATES .PPATENT OFFICE MACHiNE FOR LAIOPING WIRE DRAWING nms Paul Bieberich, Fort Wayne, Ind. Application October 29, 1945, Serial No. 625,198

Claims. 7 1 This invention relates to improvements in machines for lapping wire drawing dies of the type wherein ,a refractory die body is encased in metal forming a compact. The purpose of the instant invention is to dress the wall of the bore of a compact after having been pierced preparatory to the lapping operation as required in the customary practice, Machines ordinarily used for such lapping operations have provisions for swaying the compact, as it rotates upon its axis, laterally to a greater or lesser extent while the lapping tool is rotated and axially reciprocated in the bore of the compact in order to shape the ingress and egress openings indefinite conical form. Generally, lapping machines have been provided with mechanism by which the compact, during the dressing operation, .is swayed laterally during rotation thereof, and also it is a practice to raise and lower the compact, while on its support, relative to the lapping tool or needle during the lapping operation. Ordinarily, adjustment of the supporting mechanism is such as to increase or decrease the extent of swaying movement of the compact support which causes detrimental shifting of the point of contact between the lapping tool and the wall of the bore in the compact.

An object of the instant invention is to provide ,in the mechanism of a lapping machine adjustrespect to the lapping tool without altering the extent of the swaying movement of the support.

And a further object or the invention is to provide in a lapping machine that has a laterally swaying support for a compact associated with a revolving spindle having a lapping tool that engages a compact on said support, a means of adjustment by which to va y the lateral swaying movement of the supp Other objects and advantages of the'inventlon appear in the following description.

"An illustrative embodiment of the invention is shown in the accompanying drawings, in which:

7 Fig. 1 is a front elevational view of a structure in which the invention is incorporated, a portion being broken away;

Fig. 2 is a side elevational view in cross-section on the line 2-2 of Fig. 1;

Fig. 3 is a detail top plan view of a part of Fig. 1 indicated by the lines 3-3 thereof;

Fig. 4 is a side elevational view in cross-section of a swinging support for a die compact;

Fig. 5 is a schematic perspective view of power transmitting mechanism for the, lapping machine;

Fig. 6 is a detail view in cross-section of an adjustable eccentric used in the machine; and

Fig. 7 is a front elevational View of Fig. 6, parts being omitted.

The illustrative embodiment of the invention consists of a machine in which are provided spindles having lapping tools mounted for axial and rotary movement, die compact mounts arranged upon laterally swaying adjustable supports axially alined with said spindles respectively to have rotation, gearing for imparting swaying movement to said supports including means to vary the extent of such movement, and means for activating said gearing and spindles.

The machine has a main frame consisting of a base 8, uprights 9 surmounting the base, and a series of transversely disposed beams iii, H and i2 that are permanently secured upon, the uprights at points thereon spaced apart from each other. On the beams II and I? are provided adjustable bearings l3 and M in which are disposed corresponding spindles 15 to have free axial and rotary movement therein, each spindle being provided with a belt pulley l6, and also at its lower end with a chuck IT in which is secured a lapping tool or needle I 8;

Means are provided for impartin axial movement to the spindles consisting of fingers 19 that have pivotal movement on a shaft 20 supported by brackets 2| which project forwardly from the cross-beam ll, the rear ends of which fingers extend beneath and have supporting contact with the corresponding pulleys iii. A cam shaft 22 is mounted for rotation in the brackets 2| beneath the fingers and. is provided with eccentrics 23, one for each of said fingers, and a spring tongue 24 ,on each finger bears upon the corresponding eccentric, there being provided in each finger a thumb-screw 25 that bears against the corresponding tongue whereby to vertically adjust the fingers with respect to the eccentrics and thus raise or lower the spindles accordingly.

As a means for partially counterbalancing the weight of the spindles, elastic links 26 formed preferably of rubber bands are provided for each finger, the ends of each link being connected respectively with hooks 21 and 28 on the beam l2 and the corresponding finger l9. Because of the resistance of the elastic links the downstroke of the spindles is more or less softened and the sensitiveness of the lapping tool in its action on the die compact is thus increased and subject to regulation by manipulation of the thumb-screws 25.

A pair of vertically disposed guide-bars 29, spaced apart from each other, are mounted in connection with the cross-beams l and II, one pair adjacent each spindle, and a. vertically move able head-block 30 is positioned between each pair of guide-bars and is provided with aforwardly extending stud 3! upon which is supported a carriage 32 that has lateral swinging movement about the axis of the stud. The head-block is moved adjustably on the guide-bars by means of an adjusting rod 33 that is threaded on a bracket 34 that projects rearwardly from the upper crossbeam l2, and has swivel connection at its lower end with another bracket 35 that is secured to the head-block. By turning the adjusting rod 33 the head-block and the carriage are moved up or down accordingly as the rod is turned.

On each carriage 32 (Fig. 4) is supported a rotatable arbor 36 in adjustable bearings 31 and 38, the axis of the arbor, when in mid-position, being alined with the axis of the corresponding spindle. Each arbor is provided with a belt pulley 39 and a faceeplate 4!) on which to support a die compact 41. The arbor and its faceplate constitute a mount for the die compact, and the hearings in which the arbor is mounted are vertically adjustable so that the compact when in operating position on the face-plate may readily be adjusted so that the axis of the stud 31 upon which the carriage swings intersects the axis of the die body 4 I at the center thereof.

Mechanism is provided for imparting swinging motion to the carriages 32 consistin of crossheads 42 mounted on parallel guide-rods 43 that are spaced apart from each other and secured in place on lugs 44 on the uprights 9 to whiehthe cross-beam ID is also secured.

Each cross-head consists of a pair of vertically disposed side members 45 that are held definitely spaced apart from each other by a pair of parallel cross brackets 46 that are supported on and have longitudinal sliding movement on the guide-rods 43. Between the upper end portions of the side members of each cross-head depends an extension 32 on the corresponding carriage 32, the sides of which are arcuate and have sliding movement on the inner faces of the side members 45. The curvature of the sides of said extension is such as to permit free lateral swinging movement of the carriage and also vertical movement thereof, as when the head-block 30 is raised .or lowered by manipulation of the adjusting rod 33. The carriages 32 are caused to sway laterally more or less by reciprocating sliding movement of the corresponding cross-heads on the guide-rods 43, dependent upon the stroke of the cross-heads, and gear mechanism i provided for actuating the cross-heads including means of adjustment to vary the stroke of the individual cross-heads. Preferably-there is provided a gear housing 41 secured in connection with the lowermost cross-beam I0 in which are journaled worm-wheels 48 that are actuated by corresponding worms 49 secured on a common drive-shaft 50.

The spindles 43' of the worm-wheelshave extensions"l (Figs. 6-7) thataproiect throughi'the maetsn e s meones! 992 s.

cross-beam l0 and have mounted thereon corresponding eccentrics 52. Each eccentric has a slot 53 extending therethrough, and the extension on the spindle 4B is flattened and extends snugly into the slot of the eccentric so that the eccentric is rotated together with the spindle, and is laterally adjustable thereon whereby the degree of the eccentricity of the eccentric is accordins r va ied Th outer face i the ecce tric is notched, s di at by 4. a d a lo ku 5 the inner face of which is similarly notched, is secured concentrically in connection with the spindle 48 by means of a bolt 55 and a compression spring 5'1, the spring being positioned on the bolt between its head and the lock-lug, By

the eccentric may be adjusted readily and locked in place. The eccentrics 52 are disposed between the side members 45 of the corresponding cross-heads so that upon rotation of the eccentrics lateral reciprocating movement is imparted to the cross-heads, the strokes of which vary inlength dependent upon the particular adiustment of the individual eccentrics on the worm-wheel spindles.

Power itsno2m'i i 41.' mw wim The spindles [5 the arbors 36, eccentric shaft 22 and the drive-shaft 43 for the gear mechanism are rotated concurrently .by means of any suitable power transmitting mechanism. For example, a drive-wheel 5!! is mounted on one end of the eccentric shaft 22 and on the opposite end thereof is secured a belt pulley 59 that is connected by a belt 6!) with a belt-wheel 5| on one end of the drive-shaft 50 so that upon rotation ofthe drive-wheel 58, the fingers is are pivotally actuated and the spindles i 5 axially reciprocated, and the cross heads are horizontally reciprocated on the guide-rods 43 th fOl -h the medium of the eccentrics 52, causing swaying movement of the carriages. The drive-wheel 58 is connected by means of a belt 62 with a'pulley 63 secured on a main drive-shaft 64 that is mounted on standards 65, the belt pulleys l5 are connected by means or belts 65 with corresponding drivewheels 67 mounted on said main drives haft 64, the arbor pulleys 36 are connected by means of belts 68 with corresponding belt pulleysfi mounted on a 'eountershaft '10 supported in said standards, and another pulley -'l| mounted on said eountershaft is connected by means of a belt 12 with a corresponding drive pulley l3 mounted on said main drive-shaft 64. A motor 14 mounted on the base 8 is connected by means of a belt 15 with another drive-wheel 16 mounted on the main drive-shaft, so that whenthemetor is energized all of the moving parts of the apparatus are set in motion concurrently.

l i n In operating the machine, die compacts 4| previously pierced are centered on the face plates .40 in the usual manner-and secured thereon by any suitable means such as beeswax, so that the axes of the compactsand the corresponding .artors are substantiallyia ined El e lappi tool 5.9; needle 18 are then nt odu e i to that e f t die bodies to a desired.extenllbyrais ne the carriee s-whiohis ac ompl hed by anipulating the adjusting rods33. When-themotor is energized, the spind-les I thereupon .are rotated and concurrently reciprocal-ted axially; the mounts. tca therniihehsir supe impos d -;co .n

inenit s yed so th t-thezeomna t sar rocked "to and fro 41mi the axes of the studs 3| through the medium of the swaying carriages and their actuating crossheads.

Valuable features of the invention lie in the provisions wherein the compacts are vertically adjustable relative to the lapping tools during operation of the apparatus without effecting the extent of the swaying movement of the carriages, and the provision for adjustment of the gear mechanism by which is predetermined the stroke of the individual cross-heads and consequent extent of the swaying movement of the carriages.

Variations from the particular construction above disclosed may be resorted to by the exerelse of skill in the art, without departure from the spirit or scope of the invention.

What I claim is:

1. In a wire drawing die lapping machine of the type having a main frame in which are mounted spindles with attached pendent lapping tools for axial reciprocation and rotation and provided with activating means therefor, and rotatable die compact mounts, one for each of said spindles, provided with means to rotate said mounts, vertically movable head-blocks disposed in guides on said main frame having pivotally mounted thereon corresponding laterally swaying carriages supporting said die mounts respectively, adjusting rods threaded in connection with said main frame having swivel connections respectively with said head-blocks by which to vertically adjust said carriages, transverse guide-rods supported in said main frame, cross-heads mounted on said guide-rods for lateral reciprocation thereon, provided with spaced apart side members between which pendent extensions on the respective carriages have guided movement vertically, and a gear mechanism mounted in connection with said main frame includin rotatable eccentrics disposed between the side members of the respective cross-heads and provided with means to activate said eccentrics whereby to reciprocate said cross-heads, the arrangement being such as to cause lateral swaying movement of said carriages and permit vertical adjustment thereof without altering the extent of the swaying movement imparted by the cross-heads to said carriages.

2. A wire drawing die lapping machine consisting of a main frame structure, a spindle provided with a lapping tool mounted in said frame structure for axial reciprocation and rotation and provided with activating means therefor, a headblock having vertical guided movement in said frame structure, an adjusting rod having swiveled connection with said head-block and threaded connection with said frame structure, a carriage pivotally supported on said head-block having lateral swaying movement, a mount for a die compact rotatably mounted on said carriage provided with means to activate same, a cross-head supported in said frame structure for lateral reciprocation provided with means to activate same, and a sliding connection between said cross-head and the carriage whereby swaying movement is imparted to the carriage upon reciprocation of the cross-head and vertical adjustment of the carriage is permitted without altering the extent of the swaying movement thereof.

3. A wire drawing die lapping machine consisting of a main frame structure, a spindle provided with a lapping tool mounted in said frame structure for axial reciprocation and rotation and provided with activating means therefor, a headblock having vertical guided movement in said frame structure, an adjusting rod having swiveled connection with said headblock and threaded connection with said frame structure, a carriage pivotally supported on said head-block having lateral swaying movement, a mount for a die compact rotatably mounted on said carriage provided with means to activate same, a cross-head supported in said frame structure for lateral reciprocation having operative connection with said carriage, a rotatable eccentric operatively engaging said cross-head to activate same and being adjustable on its support with respect to its eccentricity whereby to vary the stroke of said crosshead and the carriage actuated thereby, and a spring-pressed lock-lug on the support for said eccentric having notched connection with said eccentric to secure the eccentric in selected positions of adjustments on said support.

4. A wire drawing die lapping machine consisting of a main frame structure, a spindle provided with a lapping tool mounted in said frame structure for axial reciprocation and rotation and provided with activating means therefor, a headblock having vertical guided movement in said frame structure, an adjusting rod having swiveled connection with said head-block and threaded connection with said frame structure, a carriage pivotally supported on said head-block having lateral swaying movement, a mount for a die compact rotatably mounted on said carriage provided with means to activate same, a cross-head supported in said frame structure for lateral reciprocation having operative connection with said carriage, and mechanism for activating said crosshead, said mechanism consisting of a drive-shaft mounted in a gear housing on said frame structure provided with a worm engaging a worm-wheel having a spindle journaled in said housing, one end portion of which spindle is flattened, a slotted eccentric through which said flattened portion extends and on which the eccentric is laterally adjustable, said eccentric having engagement with said cross-head to activate same, and a springpressed lock-lug on the worm-wheel spindlehaving notched engagement with said eccentric to secure the eccentric in selected positions of adjustment on the spindle for said worm-wheel.

5. A wire drawing die lapping machine having a main frame, a rotatable Spindle provided with a lapping tool mounted in said frame, a carriage pivotally mounted for lateral swinging movement and vertical guided adjustment in said frame, a rotary mount for a die compact supported by said carriage, means for vertical adjustment of said carriage, and a mechanism for activating said carriage including a cross-head that has lateral reciprocating movement in said main frame and sliding connection with said carriage, the arrangement being such as to cause lateral swaying movement of said carriage and permit vertical adjustment thereof in said frame.

PAUL BIEBERICH.

REFERENCES CITED UNITED STATES PATENTS Name Date Ferrier May 30, 1944;

Number 2,350,023 

